The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operand .
Read moreHow do I ignore null in check Flutter?
You can do this in two ways:
Read moreHow do you check if a variable is null in darts?
Checking Nulls and Null-Aware Operators in Dart
Read moreHow do you fix a null safety Flutter?
Migrating to null safety
Read moreIS null safety compulsory in Flutter?
There are many reasons to migrate Flutter apps to null safety, like those mentioned above, and it’s a must-do . This feature is a breaking change and previously written apps will not compile with the null checker on which might tempt some lazy developers to not activate it.23 Mar 2021
Read moreWhat does null safety mean?
For us, in the context of null safety, that means that if an expression has a static type that does not permit null , then no possible execution of that expression can ever evaluate to null . The language provides this guarantee mostly through static checks, but there can be some runtime checks involved too.
Read moreWhat is exclamation mark in Dart?
“!” is a new dart operator for conversion from a nullable to a non-nullable type . Read here and here about sound null safety. Use it only if you are absolutely sure that the value will never be null and do not confuse it with the conditional property access operator.4 Ağu 2020
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